Product side
Write the idea in plain words. AI drafts the specification, asks the clarifying questions, and writes numbered acceptance criteria. The right people review and sign each step.
Spec-driven development
Spec Kit for product people.
Signet turns an idea into a specification your team signs, with acceptance criteria, tech decisions, and agent-ready tasks, and delivers it to your repo in Spec Kit layout, ready for your coding agent to implement.
Free with your own AI key. No credit card required.
Two sides, one spec
Developer side
The signed spec lands in your repo as specs/001-feature/spec.md, plan.md and tasks.md; each task with a complete agent prompt. Run your coding agent on it, or pick the tasks up from GitHub Issues or Azure Boards.
From idea to delivery, in eight steps
Every spec moves through the same guided flow, with UX and Tech Decisions optional per spec. The AI drafts each document; the right person reviews and signs it before the next step opens.
Idea
Describe what you want to build in your own words.
Specify
The AI writes the full specification. You review and edit it.
Clarify
The AI asks about anything unclear. Your answers complete the spec.
UX
Screens, flows, and states — with generated wireframes.
Acceptance Criteria
The numbered checklist of what “done” means for this feature.
Tech Decisions
The choices and risks developers settle before work starts.
Build Plan
Implementation-ready tasks with Agent prompts, covering every criterion.
Delivery
Tasks to Azure DevOps, documents to Git. You review before anything is created.
Nothing moves without a signature
- Named roles sign each step. Product signs the idea and specification, UX signs the design, QA signs the acceptance criteria, Dev signs the technical decisions and build plan.
- Signatures are recorded. Every signed step shows who signed and when — so “who agreed to this?” always has an answer.
- Reopening withdraws them. Change a signed document and the signatures come off. Nothing goes stale silently.
Every criterion, covered
- Criteria keep their numbers. AC-3 stays AC-3 forever, so specs, tasks, and test reports can all point at the same line.
- Tasks account for all of them. Signet generates the build plan from the signed documents and shows you that every criterion is covered by a task.
- Each task carries an Agent prompt. A ready-to-use implementation prompt, grounded in the spec — and in your codebase, when a Git connector lets Signet investigate it first.
Delivered where your team already works
Delivery is a reviewed, explicit step — you see exactly what will be created before anything is.
Spec Kit files to your repo
Approved documents become specs/NNN-name/spec.md, plan.md and tasks.md on a feature branch, as a pull request. Constitution included. Your agent implements from the branch.
Tasks to your tracker
Build Plan tasks publish to GitHub Issues, each carrying its acceptance criteria and agent prompt, or to Azure DevOps Boards as work items.
Documents as a PR
Prefer plain documents? Publish them as markdown files to Azure Repos or GitHub instead, or download everything as a zip.
Bring your own AI key — or use Signet-managed AI with prepaid credit.
Anthropic ClaudeOpenAIAzure OpenAIAWS BedrockGoogle GeminixAI Grok
Pricing
Bring your own AI key
Free
- all features included
- connect Anthropic, OpenAI, Azure OpenAI, AWS Bedrock, Google Gemini, or xAI Grok
- you pay your AI provider directly
- no credit card, no trial limit
Signet-managed AI
Prepaid credit
- no key to manage
- top up as needed, credit is spent per request based on tokens used
- new workspaces start with a small welcome credit
- everything else stays free
Questions, answered
What does Signet cost?
Signet is free. Every feature is included. AI usage is the only cost: free when you bring your own AI key and pay your provider directly, or prepaid credit when you use Signet-managed AI.
What is Signet?
Signet is a spec-driven development tool for the product side of a software team. It guides a feature from an idea to a signed specification, numbered acceptance criteria, technical decisions, and an implementation-ready build plan, then delivers it to your repo and tracker in the format your coding agents already use.
How does it work with GitHub Spec Kit?
Signet writes the same files Spec Kit uses: specs/NNN-feature/spec.md, plan.md and tasks.md, plus the project constitution. Your developers keep their Spec Kit workflow and run their coding agent on the branch Signet creates. Signet is an independent product, not affiliated with GitHub.
Who is it for?
Product owners, BAs, QA and tech leads who decide what gets built, on teams where developers implement with AI coding agents like Claude Code, Copilot or Cursor.
Do I need my own AI key?
You can bring your own key from Anthropic, OpenAI, Azure OpenAI, AWS Bedrock, Google Gemini, or xAI Grok and use Signet for free. If you’d rather not manage a key, Signet-managed AI runs on prepaid credit you top up as needed.
What does delivery look like?
Spec Kit files or plain markdown documents to GitHub or Azure Repos as a pull request; tasks to GitHub Issues or Azure DevOps Boards. Before anything is created, Signet shows you exactly what will be created and where.
Start your first spec
Create a workspace, write down the idea, and have a signed specification today.